Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 435 · 40 questions

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

1. 1.What does a capacitor do? (a) senses how bright it is (b) is a resistance knob (c) smooths a wobbly supply (d) senses how hot it is
2. 2.True or false: a resistor has coloured bands. (a) False (b) True
3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
4. 4.What does a potentiometer do? (a) makes a beeping sound (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
5. 5.What does a capacitor do? (a) makes things spin (b) has coloured bands (c) blows if current is high (d) stores a little charge
6. 6.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) stores a little charge (d) blows if current is high
7. 7.🧩 Which component limits the current? (a) fuse (b) resistor (c) transistor (d) thermistor
8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
9. 9.True or false: a motor limits the current. (a) True (b) False
10. 10.True or false: an LDR smooths a wobbly supply. (a) True (b) False
11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
12. 12.🧩 Which component has coloured bands? (a) thermistor (b) motor (c) resistor (d) diode
13. 13.True or false: a motor turns a fan or wheels. (a) False (b) True
14. 14.🧩 Which component makes a beeping sound? (a) diode (b) transistor (c) fuse (d) buzzer
15. 15.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) makes a beeping sound (d) limits the current
16. 16.True or false: an LED glows using little power. (a) False (b) True
17. 17.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) makes things spin (d) boosts a small signal
18. 18.🧩 Which component makes things spin? (a) transistor (b) thermistor (c) motor (d) potentiometer
19. 19.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) potentiometer (d) buzzer
20. 20.What does a resistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) stores a little charge (d) limits the current
21. 21.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) thermistor
22. 22.True or false: an LDR has coloured bands. (a) True (b) False
23. 23.🧩 Which component stores a little charge? (a) potentiometer (b) thermistor (c) resistor (d) capacitor
24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
25. 25.🧩 Which component senses how bright it is? (a) transistor (b) thermistor (c) diode (d) LDR
26. 26.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) LDR (d) capacitor
27. 27.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) stores a little charge (d) turns a fan or wheels
28. 28.True or false: a thermistor makes things spin. (a) True (b) False
29. 29.True or false: a diode lets current go one way. (a) False (b) True
30. 30.True or false: a potentiometer has coloured bands. (a) True (b) False
31. 31.True or false: a transistor has coloured bands. (a) True (b) False
32. 32.True or false: an LDR limits the current. (a) False (b) True
33. 33.🧩 Which component beeps for an alarm? (a) LDR (b) LED (c) buzzer (d) transistor
34. 34.True or false: a diode limits the current. (a) False (b) True
35. 35.What does a fuse do? (a) limits the current (b) blows if current is high (c) boosts a small signal (d) makes things spin
36. 36.What does a motor do? (a) senses how hot it is (b) makes things spin (c) boosts a small signal (d) has coloured bands
37. 37.What does a diode do? (a) senses how bright it is (b) beeps for an alarm (c) blows if current is high (d) lets current go one way
38. 38.True or false: a fuse makes things spin. (a) False (b) True
39. 39.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) beeps for an alarm (d) makes things spin
40. 40.What does a thermistor do? (a) makes a beeping sound (b) beeps for an alarm (c) senses how bright it is (d) senses how hot it is

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